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"""xcom dag task indices

Revision ID: 8504051e801b
Revises: 4addfa1236f1
Create Date: 2016-11-29 08:13:03.253312

"""

from alembic import op

# revision identifiers, used by Alembic.
revision = '8504051e801b'
down_revision = '4addfa1236f1'
branch_labels = None
depends_on = None


def upgrade():
    """Create Index."""
    op.create_index('idx_xcom_dag_task_date', 'xcom',
                    ['dag_id', 'task_id', 'execution_date'], unique=False)


def downgrade():
    """Drop Index."""
    op.drop_index('idx_xcom_dag_task_date', table_name='xcom')
